[DO NOT MERGE] Don't allow permission change to runtime
Prevent apps to change permission protection level to dangerous
from any other type as this would allow a privilege escalation
where an app adds a normal permission in other app's group and
then redefines it as dangerous leading to the group auto-grant.
Test: Added a CTS test which passes.
Bug: 33860747
Change-Id: I1ccf546f78ee79ff027cb98124be81c8e5265a82
(cherry picked from commit fe430be9f102893c95258cc81589df132b7d02b3)